Fuji Electric Frenic lift, Справочное руководство

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2.3 Overview of Function Code
C
hap.
2
FUN
CT
IO
N
C
O
D
E
S
When the reference speed (pre-ramp) is changed before the reference speed (final) reaches that
speed (pre-ramp) (during acceleration/deceleration)
The inverter immediately aims at the newly changed reference speed (pre-ramp), applying the
acceleration/deceleration times and S-curve acceleration/deceleration zones defined on the previous
page, just as when the reference speed (pre-ramp) is changed after the reference speed (final) reaches
the previously commanded reference speed (pre-ramp).
The differences between operations before and after the reference speed (final) reaches the speed
(pre-ramp) are as described below.
When the reference speed (pre-ramp) change yields deceleration during acceleration (Reference
speed (final) at the time of change > Reference speed (pre-ramp)), the inverter performs a short floor
operation.
 Refer to the description of function code L29 for a short floor operation.
On the contrary, when the speed changes to acceleration during deceleration, the inverter
immediately starts S-curve acceleration, which may make an impact on the load.
Acceleration/deceleration times in S-curve operation
In an S-curve operation, the acceleration/deceleration time "t" can be calculated by the following
formulae.
- If the speed deviation exceeds the S-curve zone:
100
max | |
S2 S1
N N1 N2
+
× ≥ −
T
S2 S1
N
N1 N2
t ×






+
+
−
=
100 max
- If the speed deviation is within the S-curve zone:
100
max | |
S2 S1
N N2 N1
+
× < −
T
S2 S1
S2 S1 N
N1 N2
t ×






+
×
+
×
−
=
100
100
max
| |
2
Where,
Nmax : Maximum speed (r/min)
N1
: Speed before the start of acceleration/deceleration (r/min)
N2 : Speed after the end of acceleration/deceleration (r/min)
S1 : S-curve zone (% of the maximum speed) at the start of acceleration (at the end of
deceleration)
S2 : S-curve zone (% of the maximum speed) at the end of acceleration (at the start of
deceleration)
T : Acceleration period (s) required from 0.00 r/min to the rated speed (F03)
or
Deceleration period (s) required from the rated speed (F03) to 0.00 r/min
t : Acceleration/deceleration period (s) required from N1 to N2
2-29